0 

root (/)

Both 

Holds files and directories that make up the operating system. 

1 

swap 

Both 

Provides virtual memory, or swap space. Swap space is used when running programs are too large to fit in a computer's memory. The Solaris operating environment then “swaps” programs from memory to the disk and back, as needed.

2 

— 

Both 

Refers to the entire disk, by convention. This slice is defined automatically by the format utility and the Solaris installation programs. The size of this slice should not be changed.

3 

/export

Server only 

Holds alternative versions of the operating system. These alternative versions are required by client systems whose architectures differ from that of the server. Clients with the same architecture type as the server obtain executables from the /usr file system, usually slice 6.

4 

Optional slice to be defined based on your site's needs. 

5 

Optional slice to be defined based on your site's needs. 

Can be used to hold application software added to a system. If a slice is not allocated for the /opt file system during installation, the /opt directory is put in slice 0.

6 

/usr

Both 

Holds operating system commands (also known as executables). This slice also holds documentation, system programs (init and syslogd, for example) and library routines.

7 

/home or

/export/home

Both 

Holds files that are created by users.